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math.DG2022★ 6 cited
Functors in Lorentzian geometry -- three variations on a theme
Olaf Müller
We review three examples of functors from Lorentzian categories and their applications in finiteness results, singularity theorems and boundary constructions. The third example is…
math.AP2022★ 2 cited
Solutions to the Dirac Equation in Kerr-Newman Geometries including the black-hole region
Christoph Krpoun, Olaf Müller
We investigate the Dirac equation in Kerr-Newman space-time, using horizon penetrating coordinates (Eddington-Finkelstein-Coordinates) and the Newman-Penrose formalism to separate…